CAM LOBE PROFILE CATALOG - Crane Cams Australia

MECHANICAL ROLLER PROFILES
PROFILE CODE
DUR. AT .050”/
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG. IN.
DUR. AT
.200”
TAPPET LIFT
MECHANICAL ROLLER PROFILES
TAPPET LIFT AT
TOP DEAD CENTER
104 DEG.
INTAKE
114 DEG.
EXHAUST
GROSS VALVE LIFT WITH ZERO LASH AT
THEORETICAL ROCKER RATIO SHOWN
Continued on next page.
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DESIGN
LOBE SIZE
CODE
1.50 1.60 1.70 1.76 SEE PAGE 3
430 Continued from previous page.
R-262/4302 290 .0200 186 .146 .112 .645 .688 .731 .757 A B C
R-262/4303 290 .0200 186 .147 .112 .645 .688 .732 .757 F
R-262/4521 290 .0200 188 .148 .112 .678 .723 .769 .796 F
R-263/4301 291 .0200 187 .149 .114 .645 .688 .731 .757 D
R-263/4302 290 .0200 189 .153 .117 .645 .688 .731 .757 D
R-264/4302 292 .0200 187 .150 .115 .645 .688 .731 .757 A B
R-264/4303 292 .0200 188 .151 .116 .645 .688 .732 .757 F
R-266/4301 294 .0200 190 .155 .120 .645 .688 .731 .757 D F
R-266/4302 292 .0200 189 .155 .119 .645 .688 .731 .757 A C
R-266/4781 294 .0200 193 .158 .121 .717 .765 .813 .841 F
R-268/4301 296 .0200 191 .159 .123 .645 .688 .731 .757 A B
R-268/4302 296 .0200 191 .160 .124 .645 .688 .731 .757 F
R-272/4301 301 .0200 193 .163 .129 .645 .688 .731 .757 F
452
452 roller, aggressive series for up to 1.8:1 rocker ratio.
Recommended lash is .020” intake and .022" exhaust.
R-252/452 281 .0200 173 .122 .085 .678 .723 .768 .796 D
R-254/452 283 .0200 175 .126 .089 .678 .723 .768 .796 C
R-256/452 285 .0200 177 .130 .092 .678 .723 .768 .796 C D
R-258/452 287 .0200 179 .134 .095 .678 .723 .768 .796 C F G
R-260/452 289 .0200 181 .138 .099 .678 .723 .768 .796 B C
R-262/452 291 .0200 183 .142 .103 .678 .723 .768 .796 B C F
R-264/452 293 .0200 185 .147 .106 .678 .723 .768 .796 B C G
R-266/452 295 .0200 187 .151 .110 .678 .723 .768 .796 B C F G
R-268/452 297 .0200 189 .156 .114 .678 .723 .768 .796 B C F G
R-270/452 299 .0200 191 .160 .118 .678 .723 .768 .796 B C G
R-272/452 301 .0200 193 .165 .122 .678 .723 .768 .796 B C F G
R-274/452 303 .0200 195 .169 .126 .678 .723 .768 .796 B C F G
R-276/452 305 .0200 196 .174 .131 .678 .723 .768 .796 B C
R-280/452 309 .0200 200 .183 .139 .678 .723 .768 .796 C G
R-282/452 311 .0200 202 .187 .143 .678 .723 .768 .796 A C F G
R-284/452 313 .0200 204 .192 .147 .678 .723 .768 .796 B
R-286/452 315 .0200 206 .196 .152 .678 .723 .768 .796 A
4467
4467 roller series created for oval track and drag racing that gives a .700”+ net
valve lift when used with a 1.6:1 or greater rocker ratio. Recommended lash is .012”.
R-252/4467 284 .0202 177 .126 .089 .670 .715 .759 .786 B
R-256/4467 288 .0202 180 .139 .096 .670 .715 .759 .786 B
R-258/4467 290 .0202 182 .142 .100 .670 .715 .759 .786 B F
R-260/4467 292 .0202 184 .144 .104 .670 .715 .759 .786 B F
R-262/4467 294 .0202 186 .148 .108 .670 .715 .759 .786 B C F G
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